LG-LMM1030A-cs-sm 维修电路原理图.pdf

3CD CHANGERHI-FI SYSTEMSERVICE MANUALMODEL: LM-M1030A/D/X, LMS-M1030SERVICE MANUALMODEL: LM-M1030A/D/X, LMS-M1030REVISIONRadioFans.CN 收音机爱 好者资料库- 1-1 -CONTENTSSECTION 1. GENERAL SERVICING PRECAUTIONS1-2 ESD PRECAUTIONS1-4 SPECIFICATIONS1-5SECTION 2. ELECTRICAL ADJUSTMENTS2-1 TROUBLESHOOTING2-3 WAVEFORMS OF MAJOR CHECK POINT2-15 BLOCK DIAGRAM2-27 SCHEMATIC DIAGRAMS2-29 WIRING DIAGRAM2-37 PRINTED CIRCUIT DIARGAMS2-39 INTERNAL BLOCK DIAGRAM OF ICs2-49 REPAIRS REGARDING CD MECHANISM2-58SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION 3-1 TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)3-3 TAPE DECK MECHANISM: AUTO REVERSE DECK3-5 CD MECHANISM3-7SECTION 4. SPEAKER4-1SECTION 5. REPLACEMENT PARTS LIST5-1RadioFans.CN 收音机爱 好者资料库 SERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage1) The pick-up should always be left in its conductive bag until immediately prior to use.2) The pick-up should never be subjected to external pressure or impact.2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure andimpact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/ordamage to the printed-circuit board.3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reasonthe adjustment point and installation screws should absolutely never be touched.4) Laser beams may damage the eyes!Absolutely never permit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.5) Cleaning the lens surfaceIf there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as usedfor camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, acotton swab should be used, taking care not to distort this.6) Never attempt to disassemble the pick-up.Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Donot use any other liquid cleaners, because they will damage the lens.) Take care not to use too much ofthis alcohol on the swab, and do not allow the alcohol to get inside the pick-up.- 1-2 -Storage in conductive bagDrop impactNEVER look directly at the laser beam, and dont letcontact fingers or other exposed skin.MagnetHow to hold the pick-upPressurePressureCotton swabConductive SheetSECTION 1. GENERALNOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). Thesecomponents are sensitive to, and easily affected by, static electricity. If such static electricity is highvoltage, components can be damaged, and for that reason components should be handled with care.2) The pick-up is composed of many optical components and other high-precision components. Care mustbe taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strongmagnetism is present, or where there is excessive dust.2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit2) All equipment, measuring instruments and tools must be grounded.3) The workbench should be covered with a conductive sheet and grounded.When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This isbecause there is the possibility of damage by static electricity.)4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1M)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to preventstatic electricity changes in the clothing to escape from the armband.7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.CLEARING MALFUNCTIONYou can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of thevolume knob for more than 3 seconds. If you reset your unit, you must reenter all its settings(stations, clock, timer)NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.- 1-3 -ArmbandConductiveSheetResistor(1 Mohm)Resistor(1 Mohm)VOLUME KNOBUPDOWNVOLUMERESET jump wire ESD PRECAUTIONSElectrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such componentscommonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integratedcircuits and some field-effect transistors and semiconductor chip components. The following techniques shouldbe used to help reduce the incidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain offany electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should be removed for potential shock reasonsprior to applying power to the unit under test.2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductivesurface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static cangenerate electrical charges sufficient to damage ESD devices.5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDdevices.6. Do not remove a replacement ESD device from its protective package until immediately before you are readyto install it. (Most replacement ESD devices are packaged with leads electrically shorted together byconductive foam, aluminum foil or comparable conductive materials).7. Immediately before removing the protective material from the leads of a replacement ESD device, touch theprotective material to the chassis or circuit assembly into which the device will by installed.CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHERSAFETY PRECAUTIONS.8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motionsuch as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor cangenerate static electricity sufficient to damage an ESD device).CAUTION. GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, ISINTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OFELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.- 1-4 - 1-5 - SPECIFICATIONSLM-M1030A/D/XLMS-M1030- 1-6 -MEMO- 2-1 -TAPE DECK ADJUSTMENT1. AZIMUTH ADJUSTMENTFigure 1. Azimuth Adjustment Connection DiagramCH1 CH2Speaker OutPlayback ModeHeadTest TapeMTT-114L chR chGNDDual-tracesynchroscopeElectronicVoltmeterL outR outUnit ADJUSTMENTSThis set has been aligned at the factory and normally will not require further adjustment. As a result, it is notrecommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tamperswith the adjustment, realignment may be necessary.IMPORTANT1. Check Power-source voltage.2. Set the function switch to band being aligned.3. Turn volume control to minimum unless otherwise noted.4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified.5. Keep the signal input as low as possible to avoid AGC and AC action.Deck ModeTest TapeTest PointAdjustmentAdjust forA Deck PlaybackMTT-114Speaker OutDECK ScrewMaximumAzimuth ScrewB Deck PlaybackMTT-114Speaker OutAzimuth ScrewMaximum2. MOTOR SPEED ADJUSTMENTFigure 2. Motor Speed Adjustment Connection DiagramHeadPlayback ModeUnitSpeaker OutGNDL outR outRecord/PlaybackheadTest TapeMTT-111Frequency CounterDeck ModeTest TapeTest PointAdjustmentAdjust forRemarkNormal SpeedMTT-111Speaker OutVR5013kHz 1%A DeckHI-SpeedMTT-111Speaker Outmore than 5.4kHzHI-Speed Dubbing ModeSECTION 2. ELECTRICAL- 2-2 -3. RECORD BIAS ADJUSTMENTHeadUnitPN202GNDRecord/PlaybackheadTest TapeMTT-5511Record/Playbackand Pause ModeFrequency CounterDeck ModeTest TapeTest PointAdjustmentAdjust forRec/PauseMTT-5511ERASE HEADL20360kHz5kHz (Auto stop)WIRE(PN202)85kHz5kHz(Auto Reverse)Figure 3. Record Bias Adjustment Connection Diagram- 2-3 - TROUBLESHOOTINGTURN ON CDCONNECTOR CHECK ( PN808,PN807 )CHECK POWER SUPPLY CIRCUIT( PN808 )CHECK MICOM INTERFACE CIRCUIT( PN807 )CHECK MICOM INTERFACE CIRCUIT( PN807 )CONNECTOR CHECK(PN801,PN802)CHECK PICKUP MOVEMENTCHECK BA5810FP (IC803)CHECK MN6627933CG (IC801)CHECK AN22004 (IC802)CONNECTOR CHECK (PN808)CONNECTOR CHECK( PN808,PN807,PN802,PN801 )OPEN CLOSE CHECK“ READING ”DISPLAY CHECKREADING OK CHECKIF PLAY, AUDIOOUTPUT CHECKOKNONONONOYESYESYESYESYES CD PART- 2-4 - OPEN CLOSE NGCONNECTOR LOCKING CHECK ( PN808,PN807 )DEFECTIVE MAINPOEWR SUPPLYDEFECTIVE MICOMDEFECTIVE IC803DEFECTIVEMECHANISMCHECK POWER SUPPLY CIRCUIT( PN808 ,PN807)PN808 PIN 5 = 6.2V, PIN 7 = 5VPN807 PIN 1 = 5VCHECK VOLTAGE CHANGE OF OPEN CLOSE ,AND BTLMUTE VOLTAGE(= 5V)(PN807 PIN 20:OPEN, 19:CLOSE, 4:BTLMUTE)CHECK VOLTAGE CHANGE LO+, LO- OF IC803(PN807, PIN OPEN:20, CLOSE:19)YESYESYESNONONONO- 2-5 - “ READING ” DISPLAY CHECK(= ONLY “CD “DISPLAY) CONNECTOR LOCKING CHECK(PN808,PN807,PN802,PN801 )DEFECTIVE CONNECTOR ORMAIN POWER SUPPLAYDEFECTIVE IC805DEFECTIVE MICOM OR CONNECTORDEFECTIVE MICOM OR CONNECTORDEFECTIVE IC801CHECK VOLTAGE THE PIN 2 OF IC805IC805 PIN2 : 3.3VCHECK RESET SIGNAL OF PN807PN807 PIN12 : 5VCHECK POWER SUPPLYPORT( PN808 ,PN807)PN808 PIN 5 = 6.2V, PIN 7 = 5VPN807 PIN 1 = 5VCHECK POWER SUPPLYPORT( PN808 ,PN807)PN808 PIN 5 = 6.2V, PIN 7 = 5VPN807 PIN 1 = 5VCHECK MICOM INTERFACECIRCUIT( PN807 )PN807 PIN 11,13,14,15 SIGNAL CHECK(11: STAT, 13: MDATA, 14:MCLK, 15:MLD)CHECK THE WAVE FORM #1YESYESYESYESYESNONONONONO- 2-6 - READING OK CHECK(= “NO DISC” DISPLAY)A A A AB B B BC C C CD D D DE E E ECONNECTOR LOCKINGCHECK(PN801,PN802)DOES SLED MOVE ?CHECK PN802 PIN 3,4( SL+,SL-)DEFECTIVE PICKUP ORIC803 OR IC801 OR IC802DEFECTIVE PICKUP ORIC803 OR IC801 OR IC802DEFECTIVE PICKUP OR IC803 OR IC801DEFECTIVE PICKUP ORIC802DEFECTIVE PICKUP OR IC803DEFECTIVE PICKUP OR IC803 OR IC801 OR IC802CHECK PN802 PIN 10( LD )CHECK PN801 PIN 14,15 (TA- ,TA+)CHECK PN802 PIN 5,6( SP+,SP-)CHECK PN801 PIN 13,16( FA-, FA+)DOES LENSE MOVE ?(= UP & DOWN)DOES LASER LIGHT ?DOES SPINDLE ROTATE ?IS READING OK ?YESYESYESYESYESNONONONONO- 2-7 -CHECK PN802 CONNECTOR LINEDEFECTIVE IC801DEFECTIVE IC803DEFECTIVE PN802CONNECTORDEFECTIVE PICKUP SLED MOTOR READING OK CHECK #A(= “NO DISC” DISPLAY)A A A ADOES SL+ WAVEFORM APPEAR AT( IC803 PIN14 AND PN802 PIN3)WAVEFORM #2SLED MOTOR WAVEDOES SLIN WAVEFORM APPEAR AT( IC803 PIN 5)WAVEFORM #2SLED DRIVE WAVEYESYESNONONONONO- 2-8 -CHECK PN801 CONNECTOR LINEDEFECTIVE IC801DEFECTIVE IC803DEFECTIVE PN801CONNECTORDEFECTIVE PICKUP FOCUS ACTUATOR READING OK CHECK #B(= “NO DISC” DISPLAY)B B B BDOES FA+ WAVEFORM APPEAR AT( IC803 PIN15 AND PN801 PIN16)WAVEFORM #3FOCUS COIL DRIVE WAVEDOES FAIN- WAVEFORM APPEAR AT( IC803 PIN 26)WAVEFORM #3FOCUS DRIVE WAVEYESYESNONONONONO- 2-9 -CHECK PN801 CONNECTOR LINEDEFECTIVE IC805DEFECTIVE IC802DEFECTIVE Q801 OR D811DEFECTIVE PN801CONNECTORDEFECTIVE PICKUP LASER PART READING OK CHECK #C(= “NO DISC” DISPLAY)C C C C IS ?V APPLIED TO PIN10 OF PN801LASER SUPPLY VOLTAGE CHECKIS 3.3 V APPLIED TO PIN3 OF IC802RF IC SUPPLY VOLTAGE CHECKIS 2.0 V PIN2 OF IC802LASER CONTROL VOLTAGE CHECKYESYESNONONONONONO- 2-10 -CHECK PN802 CONNECTOR LINEDEFECTIVE IC801DEFECTIVE IC803DEFECTIVE PN802CONNECTORDEFECTIVE PICKUP SPINDLE MOTOR READING OK CHECK #D (= “NO DISC” DISPLAY)D D D DDOES SP+ WAVEFORM APPEAR AT( IC803 PIN12 AND PN802PIN6)WAVEFORM #4SPINDLE MOTOR DRIVE WAVEDOES SPIN WAVEFORM APPEAR AT( IC803 PIN 6)WAVEFORM #4SPINDLE DRIVE WAVEYESYESNONONONO- 2-11 -E E E ECHECK PN802 CONNECTOR LINEDOES ARF SIGNAL APPEAR?(IC802 PORT 8)WAVEFORM #6DOES FE, TE SIGNAL APPEAR?(IC802 PORT FE:23, TE:21)WAVEFORM #6DEFECTIVE IC801DEFECTIVE IC803DEFECTIVE PN802CONNECTORDEFECTIVE PICKUP OR IC802DEFECTIVE PICKUP OR IC802DEFECTIVE IC801 READING OK CHECK # E (= “NO DISC” DISPLAY)DOES TA+ WAVEFORM APPEAR AT( IC803 PIN17 AND PN801 PIN15)WAVEFORM #5TRACKING COIL DRIVE WAVEDOES TAIN- WAVEFORM APPEAR AT( IC803 PIN 23)WAVEFORM #5TRACKING DRIVE WAVEYESYESYESNONONONONONONO- 2-12 - CD PART VOLTAGE SHEETICPIN NO.STOPCD-DA PLAYMP3 PLAYIC8011003.3MN6627933CG2003.33003.34003.353.33.33.36003.370008003.39003.310003.311003.312003.313003.3143.33.33.3153.33.33.3163.33.33.3173.33.33.3183.33.33.319003.320003.321003.322003.3233.33.33.32400025003.32600027000281.51.51.5291.61.51.6303.303.3311.61.61.6320003300034000351.61.61.636000371.61.71.738000393.33.33.3401.61.61.6411.61.61.6421.61.61.6431.61.61.6442.32.32.3451.51.51.54603.33.3473004800049000503.33.33.3ICPIN NO.STOPCD-DA PLAYMP3 PLAY510.80.80.8521.61.61.6531.61.61.6543.33.33.35511.415611.4157000581.61.61.659000601.61.61.6613.33.33.36200063000640006500066000671.51.51.5680006900070000711.11.11.1722.82.82.873000742.92.92.975000760007700078000791.61.61.680003.3812.92.92.9823.33.33.383000841.61.51.5851.61.61.6863.33.33.3871.51.51.588003.389003.390003.391003.392003.393003.394003.395003.396003.397003.3983.33.33.399003.3100003.3- 2-13 -ICPIN NO.STOPCD-DA PLAYMP3 PLAYIC8021000AN22004A22.82233.33.33.34000502.32.361.62271.31.61.680.41.51.591.31.51.5101.51.51.5111.522121111300014000153001603.33.317000181.61.61.6191.61.61.6201.61.61.6211.61.61.6221.61.61.6231.61.61.624 0 (*CD-RW: 3.0) 0 (*CD-RW: 3.0)0 (*CD-RW: 3.0)251.61.61.6261.61.61.6271.61.71.6281.61.71.6291.61.71.6301.61.71.6311.61.71.6321.61.71.6ICPIN NO.STOPCD-DA PLAYMP3 PLAYIC8031000BA5810FP200031.51.51.543.63.73.751.61.61.661.61.61.676.26.26.286.26.26.2900010000113.23.43.4123.233133.23.23.2143.23.23.21532.82.8163.33.43.4173.23.23.2183.23.23.219000206.26.26.2213.63.73.7221.61.61.6231.61.61.6241.61.61.6251.61.61.6261.61.61.6271.61.61.6281.61.61.6- 2-14 -ICPIN NO.STOPCD-DA PLAYMP3 PLAYIC80413.33.33.3M12L16161A2003.33003.340005003.36003.373.33.33.38003.39003.31000011003.312003.3133.33.33.3143.33.33.3153.33.33.3163.33.33.3173.33.33.3183.33.33.319003.320003.321003.322003.323003.324003.3253.33.33.32600027003.328003.329003.330003.331003.332003.333000343.33.33.335003.3363.33.33.337000383.33.33.339003.340003.34100042003.343003.3443.33.33.345003.